I have a 98 blazer. I can drive it for like 5 or 10 minutes, but afterwards if i let the rpms go down, the car will die

I have a 98 blazer. I can drive it for like 5 or 10 minutes, but afterwards if i stop or let the rpms go down, the car will die. sometimes i can hit the brakes and throttle at the same time while stopped, but it doesnt always work out so well... I just replaced the water pump it in so i know it isnt overheating. someone told me my catalytic converter is plugged up and i need to either drill a hole in it or chop off my exhaust. another told me i have a vacuum leak, and another still told me i need to poke a hole in my fuel filter (or replace it). can anyone help me?

2 Answers

If the catalytic converter was
plugged to the point where it was
causing a rough idle, the vehicle
would have 0 power and the engine
wouldn't rev past 2000rpm in gear.
Do not poke a hole in the fuel filter.
Its a $7 part and removing one side
of the line gets you half way to full
removal. The filter also prevents
contaminates from entering the
engine and fuel injectors.
Contaminates clog injectors and can
also make them stick open.
Contaminates can also put micro
scratches in the cylinder walls
causing improper lubrication.
Vacuum lines are a possibility. Low
fuel pressure is a possibility and the
need for a tune up is a possibility.
Low fuel pressure gets worse with
higher rpms. Vacuum leak
symptoms disappear at higher rpms.
The need for a tuneup tend to idle
crappy, sometimes allowing a
smooth cruise and runs crappy
under a hard acceleration. The fuel
pressure and vacuum will always be
the way I described but a tune up
can look like either, neither, or both.
There are plenty of other possibilities
but these three are usually where a
mechanic starts because they are
the easiest and most common.

Your Answer

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